Drag and Drop jquery collection add-on for ecommerce site.
The Modal Pop-up Dialog Box on jQuery, jQuery UI and DialogExtend with the skins in the style of Metro.
Waves is a Click effect inspired by Google’s material design.
I stumbled across the VoicesHavePower website which uses a nice grid layout to separate its contents. It showcases stories each with a content panel that gives off a nice looking flat shadow. As you scroll through the website, each individual panel dynamically shifts the shadow based on where it is in your window. I’ve recreated this effect with CSS3 transform effects and some jQuery.
The utility has no dependencies, weighs ~5kb (sans GeoJSON), and also comes with a simple wrapper to use with jQuery or Zepto.